Details for Patent: 5,092,843

Summary for Patent: 5,092,843

Title:

Dispersion multichamber auto-injector

Abstract:

A medicament container assembly for an autoinjector having a power assembly actuatable to cause a power stroke in cooperating relation with said medicament container assembly. The medicament container assembly comprises a container having a forward end, a hypodermic needle having a sharpened end, and first and second liquid medicaments. A pair of pistons and a closure assembly are provided for (1) sealingly confining the first liquid medicament and the needle in mutually communicating relation in a forward storage position within the container, (2) sealingly confining the second liquid medicament within the container in a separate rearward storage position, and (3) enabling the power stroke to cause (1) an initial movement of the needle into the injection site during which the sharpened end of the needle moves from a position of entry into the skin to a full depth position, (2) a progressive movement of the first medicament outwardly of the sharpened end of the needle as the sharpened end of the needle moves from the position of entry into the skin into the full depth position so as to inject a predetermined dosage of the first liquid medicament within the injection site in a first pattern surrounding the path of movement of the sharpened end of the needle, and (3) a progressive movement of the second medicament outwardly of the sharpened end of the needle generally after the sharpened end of the needle has reached the full depth position thereof to inject a predetermined dosage of the second liquid medicament within the injection site in a second pattern extending from the sharpened end of the needle.

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